Page 63 - Chemistry ICSE Class X
P. 63
Chemical Bonding 51
VI. Oxygen (a) (b) (c)
VII. Ozone (a) (b) (c)
VIII. Aluminium chloride (a) (b) (c)
IX. Hydrogen peroxide (a) (b) (c)
X. Sodium sulphide (a) (b) (c)
XI. Ethanol (a) (b) (c)
XII. Carbon dioxide (a) (b) (c)
XIII. Ammonium ion (a) (b) (c)
XIV. Ammonia gas (a) (b) (c)
26. (a) Write electron-dot structures for sodium, oxygen and magnesium.
(b) Show the formation of Na O and MgO by the transfer of electrons.
2
(c) What are the ions present in these compounds?
Answers
(i) (b) (ii) (d) (iii) (b) (iv) (c)
(v) I. (a); II. (b); III. (b); IV. (a); V. (b); VI. (b); VII. (c); VIII. (b); IX. (b); X. (a); XI. (b); XII. (b); XIII. (c); XIV. (b).
Questions from Board Papers
Q 1. (KNN KP VJG DNCPMU HTQO VJG EJQKEGU IKXGP DGNQY [ICSE 2011]
(i) In covalent compounds, the bond is formed due to the ________ UJCTKPI VTCPUHGT QH GNGEVTQPU
(ii) Electrovalent compounds have a ________ NQY JKIJ DQKNKPI RQKPV
(iii) A molecule of ________ contains a triple bond. (hydrogen, ammonia, nitrogen)
Q 2. By drawing an electron dot diagram, show the lone pair effect leading to the formation of ammonium ion from
ammonia gas and hydrogen ion. [ICSE 2011]
Q 3. Differentiate between electrical conductivity of copper sulphate solution and copper metal. [ICSE 2011]
Q 4. Draw an electron dot diagram to show the structure of hydronium ion. State the type of bonding present in it.
[ICSE 2012]
Q 5. There are three elements E, F, G with atomic numbers 19, 8 and 17, respectively. [ICSE 2012]
(i) Classify the elements as metals and non-metals.
(ii) Give the molecular formula of the compound formed between E and G and state the type of chemical bond
in this compound.
Q 6. )KXG C UWKVCDNG EJGOKECN VGTO HQT VJG HQNNQYKPI [ICSE 2013]
(i) A bond formed by a shared pair of electrons with both electrons coming from the same atom.
Q 7. %JQQUG VJG OQUV CRRTQRTKCVG CPUYGT HTQO VJG HQNNQYKPI QRVKQPU [ICSE 2013]
(i) Among the following compounds, identify the compound that has all three bonds (ionic, covalent and
coordinate bond).
(A) Ammonia (B) Ammonium chloride (C) Sodium hydroxide (D) Calcium chloride
(ii) Which of the following is not a typical property of an ionic compound?
(A) High melting point.
(B) Conducts electricity in the molten and in the aqueous solution state.
